Remove digital signature

[Matthias Haberkorn]

Hi Developers,

I would like to ask if it's possible to remove a digital signature from a signed PDF?
The reason about: we store the signed document and later - if somebody wishes the original doc - strip down the signed document.

thanks in advance

Matthew
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[Paulo Soares]

It depends on the required strip level. The simplest way is to go to the signature field and delete the value and the appearance. You'll be left with an empty signature.

> -----Original Message-----
> From: itext-questions-admin@...
> [mailto:itext-questions-admin@...] On
> Behalf Of Matthias Haberkorn
> Sent: Monday, July 18, 2005 11:18 AM
> To: itext-questions@...
> Subject: [iText-questions] Remove digital signature
>
>
> Hi Developers,
>
> I would like to ask if it's possible to remove a digital
> signature from a signed PDF?
> The reason about: we store the signed document and later - if
> somebody wishes the original doc - strip down the signed document.
>
> thanks in advance
>
> Matthew
> ______________________________________________________________
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> http://freemail.web.de/features/?mc=021179
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>
>
>
>
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[Leonard Rosenthol]

At 06:18 AM 7/18/2005, Matthias Haberkorn wrote:
>I would like to ask if it's possible to remove a digital signature
>from a signed PDF?

         Sure.


>The reason about: we store the signed document and later - if
>somebody wishes the original doc - strip down the signed document.

         Since a signed document is the original + a signature, why
strip it?  Or are these visible signatures and not just signed docs?


Leonard

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[Matthias Haberkorn]

Hi,

hm, I really want to strip it of the document.
The problem is: the customer want a digital signatur (which works great with your library - many many thanks to you) and want to store the signed document.
The document gets stored in a database. But there are some needs to get the original document back.
So my question is: can I strip off anything from the PDF so it looks like the original document (before it was signed)?

Thanks in advance for your quick answers

byebye

Matthew

"Paulo Soares" <psoares@...> schrieb am 18.07.05 15:23:07:

>
> It depends on the required strip level. The simplest way is to go to the signature field and delete the value and the appearance. You'll be left with an empty signature.
>
> > -----Original Message-----
> > From: itext-questions-admin@...
> > [mailto:itext-questions-admin@...] On
> > Behalf Of Matthias Haberkorn
> > Sent: Monday, July 18, 2005 11:18 AM
> > To: itext-questions@...
> > Subject: [iText-questions] Remove digital signature
> >
> >
> > Hi Developers,
> >
> > I would like to ask if it's possible to remove a digital
> > signature from a signed PDF?
> > The reason about: we store the signed document and later - if
> > somebody wishes the original doc - strip down the signed document.
> >
> > thanks in advance
> >
> > Matthew
> > ______________________________________________________________
> > ___________
> > Mit der Gruppen-SMS von WEB.DE FreeMail können Sie eine SMS an alle
> > Freunde gleichzeitig schicken:
> > http://freemail.web.de/features/?mc=021179
> >
> >
> >
> >
> >
> > -------------------------------------------------------
> > SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
> > from IBM. Find simple to follow Roadmaps, straightforward articles,
> > informative Webcasts and more! Get everything you need to get up to
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> > _______________________________________________
> > iText-questions mailing list
> > iText-questions@...
> > https://lists.sourceforge.net/lists/listinfo/itext-questions
> >

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[Leonard Rosenthol]

At 10:33 AM 7/18/2005, Matthias Haberkorn wrote:
>So my question is: can I strip off anything from the PDF so it looks
>like the original document (before it was signed)?

         Technically, yes - it is possible.

         There are, however, NO tools currently available that offer
that functionality.  It would require a fairly detailed development
project - since it involves knowing what gets done during signing and
therefore is safe to remove.   And doing so.


Leonard

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Has anyone ever experienced issues when trying to use
iText on a server in a DMZ not part of a domain?

How did you resolve it?

What steps might be taken to determine what the
Network (permissions/issues) are or should be?

Thanks for any thought's and help.

Brian


               
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